<!DOCTYPE HTML>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
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<html><head>
  <meta charset="utf-8">
  <title>Reference: fit-content() track sizing</title>
  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1281320">
  <style type="text/css">
body,html { color:black; background:white; font-size:1px; padding:0; margin:0; }

.grid {
  display: grid;
  grid-template-rows: auto auto;
  position: relative;
  border: 1px solid;
}

.c1 { grid-template-columns: max-content minmax(100px, 1fr); }
.c2 { grid: auto 10px / 200px 0 minmax(100px, 1fr); }
.c3 { grid: auto 10px / 100px 100px minmax(0px, 1fr); }
.c4 { grid: auto 10px / 100px 100px minmax(100px, 1fr); }
.c5 { grid: auto 10px / 0px minmax(0, 1fr) minmax(100px, 1fr); }
.c6 { grid: auto 10px / fit-content(0px) minmax(0, 1fr) minmax(100px, 1fr); }
.c7 { grid: auto 10px / fit-content(40%) fit-content(40%); }

span { line-height:0; grid-column:span 2; background: lime; }
.c1 span { grid-column:span 1; }

a {
  display: inline-block;
  width: 50px;
  height: 1px;
}

y {
  position: absolute;
  left:0; right:0; top:0; bottom:0;
  grid-area: 2/2/3/3;
  height: 1px;
  background: grey;
}

.w3 .c1 { grid-template-columns: 176px minmax(0px, 1fr); }
.w3 .c2 { grid-template-columns: 176px 0 minmax(0px, 1fr); }

.w4 .c1 { grid-template-columns: 152px minmax(0px, 1fr); }
.w4 .c2 { grid-template-columns: 152px 0 minmax(0px, 1fr); }

.w5 .c1 { grid-template-columns: 128px minmax(0px, 1fr); }
.w5 .c2 { grid-template-columns: 128px 0 minmax(0px, 1fr); }

.w6 .c1 { grid-template-columns: 104px minmax(0px, 1fr); }
.w6 .c2 { grid-template-columns: 104px 0 minmax(0px, 1fr); }
.w6 .c4 { grid-template-columns: 60px 100px minmax(0px, 1fr); }

.w7 .c1 { grid-template-columns: 80px minmax(0px, 1fr); }
.w7 .c2 { grid-template-columns: 80px 0 minmax(0px, 1fr); }
.w7 .c3 { grid-template-columns: 80px 80px minmax(0px, 1fr); }
.w7 .c4 { grid-template-columns: 0px 100px minmax(0px, 1fr); }

.w8 .c1 { grid-template-columns: 50px minmax(100px, 1fr); }
.w8 .c2 { grid-template-columns: 50px 0 minmax(100px, 1fr); }
.w8 .c3 { grid-template-columns: 56px 56px minmax(0, 1fr); }
.w8 .c4 { grid-template-columns: 0px 100px minmax(100px, 1fr); }

.w9 .c1 { grid-template-columns: 50px minmax(100px, 1fr); }
.w9 .c2 { grid-template-columns: 50px 0 minmax(100px, 1fr); }
.w9 .c3 { grid-template-columns: 32px 32px minmax(0, 1fr); }
.w9 .c4 { grid-template-columns: 0px 100px minmax(100px, 1fr); }

.wA .c1 { grid-template-columns: 50px minmax(100px, 1fr); }
.wA .c2 { grid-template-columns: 50px 0 minmax(100px, 1fr); }
.wA .c3 { grid-template-columns: 25px 25px minmax(0, 1fr); }
.wA .c4 { grid-template-columns: 0px 100px minmax(100px, 1fr); }

.wB .c1 { grid-template-columns: 50px minmax(100px, 1fr); }
.wB .c2 { grid-template-columns: 50px 0 minmax(100px, 1fr); }
.wB .c3 { grid-template-columns: 25px 25px minmax(0, 1fr); }
.wB .c4 { grid-template-columns: 0px 100px minmax(100px, 1fr); }

  </style>
</head>
<body>

<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c6"><span><a></a><a></a><a></a><a></a></span><y></y></div>

<div class="w2" style="width:502px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c6"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="w3" style="width:442px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="w4" style="width:382px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="w5" style="width:322px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="w6" style="width:262px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="w7" style="width:202px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c7"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="w8" style="width:142px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="w9" style="width:82px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="wA" style="width:22px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c6"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

<div class="wB" style="width:2px">
<div class="grid c1"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c2"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c3"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c4"><span><a></a><a></a><a></a><a></a></span><y></y></div>
<div class="grid c5"><span><a></a><a></a><a></a><a></a></span><y></y></div>
</div>

</body>
</html>
